Sucker-rod-elevating device



Apr. 17, 1923.

P. G. KILDOW SUCKER ROD ELEVA'IING DEVICE- Filed Apr. 27, 1921 PatentedApr. 17, 1923.

PICKEIT G. KILDOV], OF IOWA PARK, TEXAS.

SUCKER-BOD-ELEVATiNG DEVICE.

Application filed April 27, 1921. Serial No. 465,013.

T 0 all whom it may concern:

Be it known that I, Prorrnr'r Gr; KILDow, citizen of the United States,residing at Iowa Park, in the county of Wichita and State of Texas, haveinvented certain new and useful Improvements in Sucker-Rod- ElevatingDevices, of which the following is a specification.

This invention relates to a sucker rod elevating device for deep wellpumps, being particularly designed for use in connection with oil wellpumps, and has as one of its principal objects to provide a device ofthis character wherein a sucker rod may be locked against displacementfrom the device to fall back into the well.

The invention has as a further object to provide a device wherein thelatch employed will, when upward pull is exerted upon the device, bepositively moved to closed position blocking disengagement of the suckerrod from the device.

And the invention has as a still further object to provide a devicewherein, when the latch. is shifted, said latch will be automaticallylocked in closed position so that even though upward pull upon thedevice 1s relieved, the latch will, nevertheless, be held to blockdisengagement of the sucker rod from the device.

Other and incidental objects will appear hereinafter.

In the drawing:

Figure l is a plan view showing the ball. of the device swung to oneside.

Figure 2 is a sectional view illustrating the locking member of thedevice in active position, and a Figure 3 is a transverse section on theline 8-43 of Figure 2, looking in the direction of the arrows.

In carrying the invention into efiect, I employ a hook-shaped bodymember 10 having a slot 11 therein and formed on the end of the shank ofsaid body member is a trunnion 12. Threaded into the body memberopposite said trunnion is a cap bolt 13 providing a second trunnion andswingingly connected with the body member by said trunnions is a bail14: having an eye 15 so that the usual swiveled hook of a cable may bereadily connected with said bail. As particularly shown in Figure 1, thearm of the bail engaged with the cap bolt 13 is provided at its innerside with a beveled face 16.

Pivoted at a point between its ends upon the body member 10 at its upperside is a latch 17 and pivotally connected at one end to said latch is apitman 18, the outer end portion of which is, as shown in Figure 3,enlarged. to ride against the upper face of the body member and isslidably connected with said member by a pin 19 extending through asuitable slot in the pitman. At its outer end, the pitman is providedwith a beveled face to coact with the beveled face 16 of the bail.Secured at one end to the forward end portion of the pitman is a coilspring 20 the opposite end of which is en gaged with a hoolr 21 upon thebody memher. 7 normally holding the latch 17 in open position, as shownin Figure 1, lying at one side of the slot 11 in the body member engagedat its outer end with a stop pin 22 upstanding from the bill of the bodymember. Formed in the bill of the body member at its upper side is aslot or recess 23 and secured at one end in said slot is a spring detentor locking member 2 projecting beyond the periphery of the body memberso that said locking member may be readily grasped. As will be noted,the locking member 24 normally projects at its outer end portion abovethe upper face of the body member to coact with the latch 17 as shall belater explained, and is arranged to ex tend beneath the latch, when thelatch is in open position. as shown in Figure 1, so that the latch may,without interference by the locking member, be swung across said member.

is well known. the sucker rods of deep well pumps are composed of aplurality oi. sections, such as suggested. in the drawing at 25, thesections being threaded together at their meeting ends. Near their ends,the sections are usually provided with squared portions and are furtherformed with terminal heads. The operation of disassembling a rodisaccomplished by elevating the rod say for the length of one of itssections, when the section exposed at the top of the rod is unthreadedfrom the next adjacent section, the rod being then again elevated toexpose the next section, and so on until all of the sections have beendetached. .Heretofore, considerable difficulty has been experienced withthe ordinary elevating devices employed in. that no means is providedfor 104 1::-

This spring acts upon the pitma-n for ing the sucker rod againstaccidental release. Consequently, it very often happens that inunthreading a section of the rod, the rod slips from the elevatingdevice and falls back into the well. This, of course, not only occasionsdelay and danger but also involves considerable expense since is thennecessary to fish the rod out or the well. The present invention,accordingly, seelrs to oven come these disadvantages. In o iieration,the bail 14 of thedevice is first swung to one side; is shown in Figure1, when the body member is, as illustrated in Figure 3, engaged beneaththe head oi the uppermost section of the rod. the squared portion of therod being received in the slot ll. Upward pull upon the bail forelevating the rod will then serve to swing the bail to a verticalposition with respect to the body member so that the beveled: face 16 ofthe bail will be caused to ride against.- the beveled outer end of thepitman 18 for shitting the pitman longitudinally and swinging; the latch17 to closed position behind 0 rod.

As soon as the end the latch rides over the locking; member 94-, thismember will, as shown in Figure 2, spring upwardly behind the latch forautomatically locking:- the latch closed. Thus, as will be seen, pullupon the device will initially serve to positively move the latch toclosed position when the latch will then be locl c l closed so that eventhough upward strain upon the device is relieved, manipulation oi therod in the operation oidetaching one o? the sections cannot serve tocause disengage ment of the rod from the device. However. when it isdesired to release the device, the locking member 4: may, after thebail. has been swung to one side, simply be depressed when the spring;20 will operate to immediately shift the latch to open position. laccordingly provide a hipjhly ellicient con struction for the purposeset forth. and :1 device which, in actual practice. will. not only avoidthe loss of a great deal of time of the bail will shift the latch toclosed position, and means on the body member independent of the ail andshifting means to loch the latch in closed position.

2. A sucker rod elevating device including a body member, a latchpivotec. thereon and movable to closed position for locking; a rodengaged with the body member, a pitn'ian slidably mounted on the bodymember and connected to said latch, a bail pivotally connected with thebody member and con structed to actuate said pitman whereby to shi'ttthe latch to closed position.

A. sucker rod elevating: body member, a. latch pivoted thereon andmovable to closed position for locking a rod on used with the bodymember, pitman slidably mounted on. the body member and connected tosaid latch, and a bail swing);- ing ly connected to the body member andprovided with a beveled face bearingagainst the outer end of the pitmanor shitting the latch to closed position.

4. A. sucker rod elevating device including: body member, latch pivotedthereon and movable to closed position for locking a rod engaged withthe body member, a pitman connected to said latch, a bail swinginp lyconnected to the body member and provided with a beveled face to coactwith the pitman for shifting the latch to closed position. and springlocking member movable into the path oi the latch in the rear thereoffor automatically lockin the latch closed.

In testimony whereof I' afilx my signature.

PIOKETT G. KILDOW. 1,. 5.

device including

